My lights are of my own design....Cree Led along with minor T5 as a suppliment. They are all a little too high off the water (14") but they have grown my tank well for the last three years.
My ALK test is the Hanna meter. I've tried two batches of regents just in case. I also have an Elos manual kit that I checked it against periodically.
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Mark...
290g Peninsula Display, 425g total volume. Setup Jan 2013.
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